This is the how-to and the personal experience of a guy who apparently did succeed in making love to a dolphin.

I stripped off my shorts, and gently pulled her into the shallows until she was lying on her side, her belly facing towards me, half submerged in the water. I nestled myself belly to belly against her, and pressed my member against her genital slit. She immediately arched her body against mine, and took me inside her body, initiating a quick series of muscular contractions with her vaginal muscles. I wrapped my left arm around her body and just held her close while she manipulated me inside her body, until I climaxed barely 2 minutes later. Surprisingly, her body also shuddered against mine, and we spent the next 5 or so minutes just lying together in the shallows, holding each other, enjoying our company and revelling in the fact that we had shared something special together, something very few people can claim to have done.

So, did you give her a fish, and tell her you'd call her, or what? Rather interesting account, actually.